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1.
随着互联网移动的快速发展, 移动端早就成为主流媒介。针对前端开发越来越复杂以及开发效率低等问题, 基于现有移动APP 框架开发模式, 引入流行前端框架React, 通过JavaScript 语言来开发移动APP, 提出了一种基于 React 的移动应用APP 开发方法, 解决了跨平台开发过程中开发效率低和代码复用率不高等问题, 结合考虑React 的组件化特性和界面渲染效果, 采用组件化方法来开发“知情选择筛查” APP, 并利用高效界面渲染效果, 来快速切 换页面, 开发并实现了知情选择筛查功能。此APP 具有功能良好、性能稳定、链接定位准确等优点, 有很好的应用 价值和实用价值。  相似文献   
2.
1苯基5(4氟苯基)3羟基吡唑化合物是一种活性药物中间体,经测试具有一定的杀虫杀菌活性。可由1苯基5(4氟苯基)3吡唑烷酮在FeCl3的催化下,由空气中的O2氧化得到,反应进行20h基本完成。利用在线反应红外光谱对该氧化反应进程进行研究,得到一系列特征官能团吸收峰随反应进程变化的谱图。通过分析官能团特征吸收峰随时间的变化情况,初步了解了此类反应的机理和进程,并且证明了该产物在溶剂中还存在酮式异构体的结构。  相似文献   
3.
王鲁民 《建筑师》2005,(4):58-64
所谓的弗莱彻(BanisterFlecher)的“建筑之树”,包含着认为中国传统建筑是“非主流的”“非艺术的”和“非进化的”三个层次的判断,其中“非进化”的判断是长期困扰且至今仍影响着中国古代建筑历史叙述的难题。伊东忠太、梁思成、刘敦桢等学者在对于该难题的正面回答上遇到的困难,证明了西方中心主义或西方文化霸权在对中国传统建筑理解上的深入影响,事实要求我们直面中国传统建筑史料,实事求是的认识中国传统建筑的本性。文章提出如无“内在”的革命或重大的外来影响,任何民族的建筑的发展与变迁,都是在由特定的文化体系对于建筑的核心价值的认定,针对这个核心价值的初始应对格局形成的框架和边界中进行的。文章进一步提出了对于中国传统建筑性质和其变迁格局的看法,并期望通过相关的努力使得对于中国传统建筑的研究更加有机地成为中国建筑现代化的组成部分。  相似文献   
4.
Owing to constant changes in user needs, new technologies have been introduced to keep pace by building sustainable applications. Researchers and practitioners are keen to understand the factors that create an attractive user interface. Although the use of cross-platform applications and services is increasing, limited research has examined and evaluated cross-platforms for developing mobile applications for different operating systems. This study evaluates cross-platform features, identifying the main factors that help to create an attractive user adaptation when building sustainable applications for both Android and iOS. Flutter and React Native were selected so end-users could test their features using the cross-platform usability assessment model. Usability, satisfaction, and navigation were tested to measure the cross-platform adaptation and end-user experience. The data were analyzed using hybrid structural equation modeling (SEM) and artificial neural network (ANN) approaches. The study results show that usability and navigation both have a positive effect on adaptation on Flutter and React Native, while satisfaction only has an effect on Flutter. The navigation variable was also the most significant predictor of adaptation for both models. This study has several implications and makes contributions to the research field, to developers, and to end-users.  相似文献   
5.
长链烷基酰胺基咪唑啉合成进程的在线红外研究(英文)   总被引:1,自引:1,他引:0  
利用咪唑啉含有两个氮原子的五元杂环化合物特殊结构,在其合成过程中对官能团"枝接"其他功能基团,使之成为具有特殊功能的化学品,是目前国际上合成功能高分子材料研究的热点。采用硬脂酸和二乙烯三胺反应得到咪唑啉化合物,利用在线红外分析反应进程,得到一系列在线连续官能团吸收峰红外光谱图和官能团吸光度随反应时间的变化谱图。研究结果表明合成反应初期是一个物理化学反应过程;在反应过程中目标产物存在一个最低点区域,在特征官能团上"枝接"其他官能团时,应有效地避免该反应时间区域。  相似文献   
6.
目前,APP开发是移动互联网发展的重要内容,进行移动开发的方法也非常的多,如IOS,Android。文章介绍了一种新型的开发框架—React Native,用Java语言就能同时编写IOS,Android以及后台应用程序。相对传统开发方式,这种方式更加简单、便捷,且学习成本低廉。  相似文献   
7.
Reactive diluent with quaternary ammonium salts (RDQ) for UV‐curable antistatic coating was synthesized by reacting glycidyl methacrylate (GMA) and piperazin with dropping the methansulfonic acid. In order to compare the curing behavior of RDQ with commercial monomers, the photopolymerization of RDQ, 1,6‐hexandiol diacrylate (HDDA) and 1,6‐hexandiol dimethacrylate (HDDMA) were studied by using real‐time IR spectroscopy. Surface properties such as surface resistance, pencil hardness, and solvent resistance of the cured films containing RDQ were investigated. When used as a reactive diluent in the UV‐curable coating formulation, the RDQ imparted excellent antistatic properties to the final material. The results of an Fourier transform infrared/attenuated total reflectance (FTIR/ATR) depth profile analysis show that RDQ molecules are more concentrated near the surface within a micrometer‐thick layer, indicating that existence of the ionic components in the surface layer is responsible for antistatic property. Film cured from the formulation containing 12 wt % of RDQ showed the best mechanical properties with reasonable surface properties. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 132–137, 2002; DOI 10.1002/app.10273  相似文献   
8.
Increased reliability problems in deep sub-micron CMOS technologies have led to a dramatic decrease of lifetime of analog integrated circuits. To palliate this problem, several reliability-aware design approaches have been developed. Reconfigurable circuit design is one of those approaches, which is based on reconfiguring the circuit considering degradation in circuit performances. Sense & React (S & R) approach is the well-known reconfigurable design approach, where degradation in circuit performances are sensed and a pre-established recovery operation is applied to heal the circuit. In practice, indirect measurements are preferred during sense operation, in which electrical quantities are measured in order to determine time to recovery. Determination of the time to recover is the most critical part of a S & R system. One or more circuit variables are selected out of all measurable circuit quantities. The selected signature should have some attributes to be used as the aging signature to reduce the measurement cost. However, efficient aging signature properties have not been defined in the literature yet. Moreover, the designer determines the aging signature manually by performing an iterative search and evaluation on aging simulation results, and there is no tool to ease this time consuming process. This paper clearly describes the aging signature properties and proposes an automatic signature selection tool that determines the most efficient signature for sense operation.  相似文献   
9.
对序批式延时曝气SBR以及SBR的各种形式进行分析,重点闸述IDEA工艺的流程和特点,并与SBR工艺的其它各种形式进行比较分析,闸明了IDEA工艺在废水处理上特有的优点,指出人们对IDEA工艺的误区,目的是为了IDEA工艺在废水处理工程上能得到更有效地应用。  相似文献   
10.
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